#7944: GHC goes into an apparently infinite loop at -O2 -------------------------------+-------------------------------------------- Reporter: bos | Owner: Type: bug | Status: closed Priority: normal | Component: Compiler Version: 7.6.3 | Resolution: duplicate Keywords: | Os: MacOS X Architecture: x86_64 (amd64) | Failure: Compile-time crash Blockedby: | Blocking: Related: 5550 | -------------------------------+-------------------------------------------- Changes (by amosrobinson): * status: new => closed * resolution: => duplicate * related: => 5550 Comment: Hi, This looks like an instance of #5550: ForceSpecConstr was blowing up when specialising on recursive types (list, in this case). This is fixed in HEAD, but sadly there isn't a good fix until then (without modifying the vector library to remove ForceSpecConstr annotations). Can you change the [Int] to a Vector? Otherwise, you might just need to compile with -fno-spec-constr (or the lower threshhold, as you mentioned) for now. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7944#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler